.content {
    height: 2900px;
    background-color: #000000;
    position: relative;
}

.logo {
    height: 220px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 130px;
}

.log0 img {
    width: 220px;
    width: 220px;
}


/* .title span {
    height: 46px;
    width: 100%;
    line-height: 46px;
    text-align: center;
} */

.title span {
    height: 46px;
    width: 100%;
    line-height: 46px;
    text-align: center;
    display: inline-block;
    color: #ffffff;
    font-size: 30px;
    margin-top: 330px;
}

.tit img {
    width: 230px;
    height: 10px;
}

.tit em {
    padding: 0 45px;
}

.del_intr {
    position: absolute;
    left: 50%;
    margin-top: 150px;
    transform: translateX(-50%);
}

.del_intr p {
    color: #f1f1f1f1;
    margin-bottom: 40px;
    font-size: 20px;
}

.del_intr i {
    font-size: 24px;
    padding-right: 5px;
}

.band {
    width: 1100px;
    position: absolute;
    top: 900px;
    left: 50%;
    transform: translateX(-50%);
}

.express h3,
.pin h3 {
    color: #ffffff;
    font-size: 30px;
    text-align: center;
}

.pin h3 p {
    color: #ffffff;
    font-size: 16px;
}

.pic_swap {
    position: relative;
    height: 320px;
    width: 100%;
    margin-top: 90px;
}

.pic {
    height: 320px;
    width: 500px;
}

.pic img {
    width: 100%;
}

.pic_r_detail {
    position: absolute;
    left: 520px;
    top: 0;
}

.pic_r_detail p {
    color: #ffffff;
}

.pic_r_detail h4 {
    font-size: 26px;
    color: #ffffff;
}

.pic_r_detail .current {
    font-size: 16px;
    margin-top: 50px;
}

.item {
    font-size: 44px;
}

.item1 {
    font-size: 16px;
}

.item2 {
    font-size: 32px;
}

.item3 {
    font-size: 50px;
}

.pro_gros {
    margin-top: 165px;
}

.histroy-lis ul li {
    color: #ffffff;
    margin: 65px 0;
    font-size: 28px;
    padding: 0 150px;
}

.histroy-lis ul li:last-child {
    font-size: 36px;
}

.histroy-lis ul li::before {
    content: '';
    display: inline-block;
    height: 32px;
    width: 32px;
    background-color: #ffffff;
    border-radius: 50%;
    margin-right: 50px;
    vertical-align: middle;
}